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[Effect of seasonal distribution in precipitation on soil nitrogen mineralization in a subtropical forest]. / 降水季节性分配对亚热带森林土壤氮矿化的影响.
Ji, Yong-Kang; Ma, Nan; Zhang, Hui; Li, Cui-Huan; Ma, Yuan-Dan; Wu, Qi-Qian; Li, Yan.
Afiliación
  • Ji YK; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Ma N; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Zhang H; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Li CH; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Ma YD; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Wu QQ; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
  • Li Y; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
Ying Yong Sheng Tai Xue Bao ; 35(1): 186-194, 2024 Jan.
Article en Zh | MEDLINE | ID: mdl-38511455
ABSTRACT
Soil N mineralization is a key process of nutrient cycling in ecosystems. The mechanism of the seasonal distribution of precipitation on soil N mineralization remains unclear. We conducted a precipitation manipulation experiment in a subtropical forest in the middle and lower reaches of the Yangtze River in China from 2020 to 2022, with three treatments, including control (CK), decreased precipitation in the dry season with extremely increased precipitation in the wet season (T1), and decreased precipitation in the dry season with proportionally increased precipitation in the wet season (T2). With in situ resin core method, we explored the effect of seasonal distribution of precipitation on soil N mineralization. The results showed that T1 and T2 significantly decreased dry season net nitrification rate by 57.9% and 72.5% and the net N mineralization rate by 82.5% and 89.6%, respectively, and significantly increased wet season net nitrification rate by 64.3% and 79.5% and net N mineralization rate by 64.2% and 81.1%, respectively. Proportionally increased precipitation in the wet season was more conducive to soil N mine-ralization process than extremely increased precipitation in the wet season. Results of the structural equation model showed that change in seasonal distribution of precipitation could significantly affect soil N mineralization processes in the subtropical forest by changing soil water content, ammonium nitrogen, microbial biomass nitrogen, and soil CN. Our results had important reference for understanding soil nitrogen cycling and other ecological processes, and were conducive to more accurate assessment on the impacts of future changes in seasonal precipitation pattern on subtropical forest ecosystems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Nitrógeno País/Región como asunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: China
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Nitrógeno País/Región como asunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: China